___ is used in audio, phone, video, communication, and data applications.

• A. Category Cable
• B. Speaker Wire
• C. Coaxial Cable
• D. Optical Fiber Cable

Answer: (A)

Category cables are twisted-pair cabling standardized to carry multiple types of signals—voice (phone), data (Ethernet), and even video in many installations. Cat5e, Cat6, Cat6a, and similar cables are designed to support these different services within the same wiring system, which is why they’re commonly used for offices, schools, and other buildings to connect computers, phones, cameras, and AV gear. Their balanced pairs and standardized impedance help minimize crosstalk and signal loss across all these applications.

That versatility is why this option is the best fit for audio, phone, video, communication, and data. In contrast, speaker wire is meant only for speakers, coaxial cable is mainly used for RF and traditional video/cable TV (with limited use for general data networks), and optical fiber, while excellent for high-speed data over long distances, isn’t typically used for standard audio or telephone runs in the same all-in-one way as category cabling without additional equipment.